models/VidjilAuth: add can_modify_subset(sampleset_type, subset_id)
can_modify_sampleset need to make a db request to find the subset type, we should use can_modify_subset if we already know the sampleset type to avoid that.
permet un premier fix de la requete patient #2295 (closed)/#2475 (closed)
Edited by Mathieu Giraud